Model Recalibration. Since several capacity improvements, lift station upgrades, and construction projects are to be commissioned in the future, it is prudent to confirm the flows that will be routed through the entire system to confirm all improvement efforts will have the desired effect as intended in the 2017 SECAP. Accurate recalibration of the sanitary sewer system will require methodical flow monitoring. Dry-weather calibration ideally requires at least a 7-day period, including one weekend, unaffected by rainfall induced flows. The flow survey data will be assessed in conjunction with the rainfall data, to select a representative dry- weather period. Wet-weather calibration is the process by which the recorded rainfall is applied to the model, and hydrological parameters are adjusted until a suitable match is achieved between observed and modeled flows. This includes simulating the entire flow monitoring period and checking that the "tails" of the storm events are correctly replicated by the model as much as simulating the peak- wet weather flow. Detailed steps to achieve a dry-and weather calibration are as follows:
Model Recalibration. Recalibration of the watershed modeling tools will be performed when sufficient additional monitoring data is available.
Model Recalibration. Since development of the RAA, EOA has performed further monitoring of watersheds throughout the County. Paradigm will work closely with EOA to understand the pollutant source areas addressed by these monitoring efforts and develop strategies for accurately representing these source areas within the LSPC model. Paradigm will also use the monitoring data to recalibrate the model for improved performance and accurate assessment of necessary pollutant reductions to meet TMDL goals. • Updates to Planned GI Projects – Jurisdictions’ GI Plans, the County’s Stormwater Resource Plan, the SSMP, and other planning efforts have identified numerous individual GI projects that can be individually configured in the modeling system to provide accurate representation of planned projects and an understanding of their combined contribution to pollutant load reductions to meet the countywide TMDL wasteload allocations. The resulting RAA update will provide a comprehensive and relevant look at the benefits of ongoing GI planning efforts and future implementation needs to meet MRP 3.0 requirements. • Reporting – Consistent with previous RAA support, the EOA team will report essential information and RAA output (e.g., curves, tables, text) specific to each jurisdiction to provide support for strategic countywide messaging regarding RAA and GI goals. Results will also be summarized utilizing updated web-based tools developed by Paradigm. • Meetings with C/CAG staff to identify needed updates to the RAA. • Draft and final RAA/modeling update workplan. • Participation in meetings with the Water Board and other countywide programs to strategize potential updates to RAA Guidance. $52,774 Fiscal Year Subtask Description Deliverables Cost Estimate Subtask SMC514.04: GI Planning – GI Education and Outreach FY 2023/24 SGA and EOA will help C/CAG agencies increase the visibility of their GI projects, raise awareness of GI planning and projects, and encourage the public to become more engaged and supportive of GI projects and funding. We will work with C/CAG staff to develop vibrant, easy-to-understand, and engaging materials and ensure that technical information is presented in a comprehensible and appealing manner. The focus for FY 2023/24 will be supporting the requirement for cities to implement GI retrofits on public property and rights-of-way. Specifically, SGA will: • Conduct outreach to confirm upcoming projects. • Develop awareness campaigns around projects and GI benefits. • Deve...
